Colour

#B5001C

#B5001C
Red
Dark
Nearest: Firebrick

#B5001C is a red with RGB values 181, 0, 28 and HSL 351°, 100%, 35%. It is a dark colour, so white text on it reaches 7:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#B5001C#B5001C

HEX#B5001C

RGBrgb(181, 0, 28)

RGB (0–1)0.7098, 0, 0.1098

RGB percentages71%, 0%, 11%

HSLhsl(350.7, 100%, 35.5%)

HSV / HSBhsv(350.7, 100%, 71%)

CMYK0%, 100%, 84.5%, 29%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,862,044

CSS custom property--colour: #B5001C;

Brightness & contrast

Relative luminance0.09908WCAG 2.x, 0 is black and 1 is white

Perceived brightness99.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.04:1

Contrast with white7.04:1WCAG normal text: AAA

Contrast with black2.98:1WCAG normal text: Fail

Greyscale equivalent#292929

Inverted#4AFFE3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4A421Ano red cones; affects about 1% of men; ΔE 67.2 from the original

Deuteranopia#726511no green cones; the most common form, about 1% of men; ΔE 66.8 from the original

Tritanopia#C80011no blue cones; rare, and affects men and women equally; ΔE 11.9 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text7.04:1WCAG large text: AAA

Contrast with black, large text2.98:1WCAG large text: Fail

Named colours

Firebrick · ΔE 6.9 Crimson · ΔE 14.1 Dark red · ΔE 14.9 Brown · ΔE 15.7 Maroon · ΔE 18.8 Tomato · ΔE 25.8

Nearest named CSS colourFirebrick (#B22222)ΔE 6.92, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#00B599

Analogous#B50077, #B53E00

Triadic#1CB500, #001CB5

Split complementary#00B53F, #0077B5

Tetradic#77B500, #00B599, #3F00B5

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FF8295

Lighter +30%#FF4F6A

Lighter +20%#FF1C3F

Lighter +10%#E80024

Darker −10%#820014

Darker −20%#4F000C

Darker −30%#1C0004

Darker −40%#000000

More saturated +25%#B5001C

Less saturated −25%#9E172C

Channel breakdown

R181

B28

Red181 (71%)

Green0 (0%)

Blue28 (11%)

Hue350.72°

Saturation (HSL)100%

Lightness35.49%

Dominant channelRed

Hex per channelR B5 · G 00 · B 1C

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#B5001C

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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